[Corneoscleral involvement in congenital erythropoietic porphyria. Günther disease].

Congenital erythropoietic porphyria (CEP) is an extremely rare autosomal recessively inherited disorder characterized by mutilating cutaneous photosensitivity and abnormal porphyrin heme synthesis in bone marrow. The present report describes a typical case of CEP with cornea involvement and scleromalacia in areas exposed to sunlight. The results obtained by conjunctival impression cytology are reported.